WO2014183617A1 - Procédé et appareil de découverte de nœud relais - Google Patents

Procédé et appareil de découverte de nœud relais Download PDF

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Publication number
WO2014183617A1
WO2014183617A1 PCT/CN2014/077256 CN2014077256W WO2014183617A1 WO 2014183617 A1 WO2014183617 A1 WO 2014183617A1 CN 2014077256 W CN2014077256 W CN 2014077256W WO 2014183617 A1 WO2014183617 A1 WO 2014183617A1
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Prior art keywords
communication
relay
communication device
initiator
adjacent
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Application number
PCT/CN2014/077256
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English (en)
Chinese (zh)
Inventor
侯云静
康艳超
Original Assignee
电信科学技术研究院
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Filing date
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Publication of WO2014183617A1 publication Critical patent/WO2014183617A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15507—Relay station based processing for cell extension or control of coverage area

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for discovering a relay node.
  • FIG. 1 shows the data channel between UE1 and UE2 when UE1 and UE2's Serving Gateway (SGW) and Packet Data Network Gateway (PDN GW) are the same.
  • SGW Serving Gateway
  • PDN GW Packet Data Network Gateway
  • 3GPP is now studying communication technology between neighboring devices, that is, when the distance between two UEs that need to communicate is very close, data is directly transmitted between the two UEs, and the data transmission path thereof is shown in FIG. 2.
  • the communication between the two UEs is implemented by means of the eNB only, and the data transmission path thereof is shown in FIG. 3.
  • the network may control the proximity communication through the interaction control information between the UE, the eNB, and the Evolved Packet Core (EPC), and its control
  • EPC Evolved Packet Core
  • the EPC can perform signaling interaction with the serving eNBs of the communication parties respectively.
  • the control path is shown by the solid line with the double arrow in Figure 5.
  • the public safety UE (Public Safety UE) is defined in the 3GPP standard, in the area without network coverage. In the public safety UE, the proximity communication can still be performed between the public safety UEs.
  • the control path exists directly between the public safety UEs. See the solid line with the double-headed arrow in Figure 6, where the standard defines the public safety radio resource controller (Radio).
  • Radio The Resource Controller (RRC) is used to manage the allocation process of the public safety neighboring communication radio resources, and the function can be configured in the public safety UE.
  • Public safety UEs defined in the 3GPP standard can support relay capabilities, therefore, The data relay may be performed between the two non-adjacent UEs through the public safety UE supporting the relay capability, or may be performed between the UE and the network side located outside the network coverage by the public safety UE supporting the relay capability.
  • Transit In order to realize the communication between the communication parties through the communication equipment supporting the relay capability (such as the public safety UE), the following two major problems need to be solved: First, the proximity discovery process between the communication parties and the communication device supporting the relay capability, It is a process in which both parties communicate through the communication device supporting the relay capability.
  • Embodiments of the present invention provide a method and an apparatus for discovering a relay node, which are used to solve the problem of finding a proximity relationship between a communication device and a communication device supporting the relay capability existing in the prior art. The problem with the program.
  • an embodiment of the present invention provides a method for discovering a relay node, including:
  • the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself;
  • the communication initiator sends a relay request, and the relay request is used to request a neighboring communication device adjacent to itself as a relay node between itself and the communication target party, and at least the relay request Describe the identification information of the communication target party;
  • the communication initiator determines whether the neighboring communication device can act as a relay node between itself and the communication target according to the received relay reply message returned by the neighboring communication device.
  • the embodiment of the present invention provides a solution to the problem of proximity discovery between the communication parties and the communication device supporting the relay capability, that is, the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; the communication initiator Sending a relay request for requesting a neighboring communication device adjacent to itself as a relay node between itself and a communication target; the communication initiator determines according to the relay reply message returned by the received neighboring communication device Whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the sending, by the communications initiator, the sending of the relaying request the: the communications initiator sends the relay request by using a broadcast manner, and the relay request carries Self identification information and identification information of the communication target party;
  • the communication initiator determines, according to the received relay reply message sent by the neighboring communication device, whether the nearby communication device can act as a relay node between itself and the communication target, including:
  • the communication initiator determines that the neighboring communication device can act as a relay node between itself and the communication target party, and the relay reply message carries the The identification information of the near communication device.
  • the method further includes:
  • the communication initiator If the communication initiator has not received any relay reply message, it is determined that there is currently no neighboring communication device capable of acting as a relay node between itself and the communication target, and the processing is terminated.
  • the sending, by the communications initiator, the sending of the relaying request includes: sending, by the communications initiating direction, the relaying request to each of the neighboring communications devices, and the Carrying the identification information of the communication target party in the request;
  • the communication initiator determines, according to the received relay reply message sent by the neighboring communication device, whether the neighboring communication device can act as a relay node between the user and the communication target, including:
  • the communication initiator determines The near communication device can act as a relay node between itself and the communication target party;
  • the communication initiator determines The proximity communication device cannot act as a relay node between itself and the communication target.
  • the communication initiation direction sends the relay request to each neighboring communication device supporting the relay capability, where the relay capability refers to that the communication device can currently act as a relay node between other communication devices except itself. ability.
  • the communications initiator determines each of the nearby communication devices according to the following steps:
  • the communication initiator sends a first request message by using a broadcast method, where the first request message is used to request each of the neighboring communication devices to return feedback information carrying the identification information of the neighboring communication device to the first communication request, the first request The message carries the identification information of the communication initiator;
  • the communication initiator determines that the communication device corresponding to the identification information carried in the feedback information is the neighboring communication device.
  • the first request message is further used to request each of the neighboring communication devices to indicate whether the support device supports the return information.
  • Relay capability refers to the ability of the communication device to currently act as a relay node between other communication devices other than itself.
  • the communication initiator determines whether the user is adjacent to the designated communication device according to the following steps:
  • the communication initiator determines that it is adjacent to the designated communication device;
  • the communication initiator determines itself and the The specified communication device is not adjacent.
  • the second request message is further configured to request the designated communications device to indicate whether it is supported in the returned feedback information.
  • the relay capability refers to the ability of the communication device to currently act as a relay node between other communication devices other than itself.
  • the embodiment of the present invention further provides a method for discovering a relay node, including:
  • the neighboring communication device adjacent to the communication initiator After receiving the relay request sent by the communication initiator, the neighboring communication device adjacent to the communication initiator determines, according to the relay request, whether it is currently capable of acting as a communication between the communication initiator and the communication logoter a relay node, where the relay request carries at least identifier information of the communication target party;
  • the neighboring communication device determines whether to return a relay reply message to the communication initiator according to the judgment result.
  • the embodiment of the present invention provides a solution to the problem of proximity discovery between the communication parties and the communication device supporting the relay capability, that is, the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; the communication initiator Sending a relay request for requesting a neighboring communication device adjacent to itself as a relay node between itself and a communication target; the communication initiator determines according to the relay reply message returned by the received neighboring communication device Whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the relay request if the communication initiator sends the relay request by using a broadcast manner, and the relay request carries the self identification information and the identifier of the communication target Information
  • the neighboring communication device determines, according to the determination result, whether to return a relay reply message to the communication initiator, including:
  • the neighboring communication device returns a relay reply message to the communication initiator when determining that it is currently capable of acting as a relay node between the communication initiator and the communication target party, and the relay reply message carries itself Identification information;
  • the neighboring communication device discards the relay request when it determines that it is currently not a relay node between the communication initiator and the communication target.
  • the communication initiation direction sends the relay request to each of the nearby communication devices or each of the neighboring communication devices supporting the relay capability, Carrying the relay request
  • the identification information of the communication target wherein the relay capability refers to a capability that the communication device can currently act as a relay node between other communication devices except itself;
  • the neighboring communication device determines, according to the determination result, whether to return a relay reply message to the communication initiator, including:
  • the neighboring communication device returns a relay reply message carrying the first indication information to the communication initiator when determining that it is currently capable of acting as a relay node between the communication initiator and the communication target party.
  • the first indication information is used to indicate that it can serve as a relay node between the communication initiator and the communication target party;
  • the neighboring communication device determines that it is currently unable to act as a relay node between the communication initiator and the communication target, the neighboring communication device returns a relay reply message carrying the second indication information to the communication initiator.
  • the second indication information is used to indicate that it cannot be a relay node between the communication initiator and the communication target.
  • the neighboring communication device determines, according to the following steps, whether the current communication device can be the Relay node between communication targets:
  • the neighboring communication device determines that it is currently capable of acting as a relay node between the communication initiator and the communication target;
  • the neighboring communication device determines that it is not currently a relay node between the communication initiator and the communication target;
  • the relay capability refers to a capability that the communication device can currently act as a relay node between other communication devices other than itself.
  • the local communication device After the local communication device determines that it supports the relay capability and is adjacent to the communication target, it determines whether it can serve as the communication initiator and the communication target according to a preset determination condition.
  • Relay node After the local communication device determines that it supports the relay capability and is adjacent to the communication target, it determines whether it can serve as the communication initiator and the communication target according to a preset determination condition.
  • the neighboring communication device determines that it can serve as a relay node between the communication initiator and the communication target party;
  • the neighboring communication device determines that it cannot be a relay node between the communication initiator and the communication target.
  • the determining condition includes the following one or a combination:
  • the user preference of the preset the current processing load of the user, and the strength of the signal of the communication target received by itself.
  • the method further includes:
  • the proximity communication device When the proximity communication device receives the first request message that is sent by the communication initiator by way of broadcast, The communication initiator returns feedback information carrying its own identification information, where the first request message carries the identification information of the communication initiator.
  • the method further includes:
  • the neighboring communication device When the neighboring communication device receives the second request message that is sent by the communication initiator by the broadcast mode, it determines whether the identity information of the identity is the same as the identity information of the designated communication device carried in the second request message; And the neighboring communication device returns feedback information carrying the own identification information to the communication initiator; if different, the neighboring communication device discards the second request message.
  • the neighboring communication device further indicates, by using the returned feedback information, whether the mobile device supports the relay capability, where Relay capability refers to the ability of a communication device to currently act as a relay node between communication devices other than itself.
  • the nearby communication device determines a communication device adjacent to itself according to the following steps:
  • the neighboring communication device sends a third request message by using a broadcast mode, where the third request message is used to request each communication device adjacent to itself to return feedback information carrying the identification information of the communication device to itself, the third request The message carries the identification information of the neighboring communication device;
  • the neighboring communication device determines that the communication device corresponding to the identifier information carried in the feedback information is adjacent to itself.
  • the neighboring communication device determines whether it is adjacent to the designated communication device according to the following steps:
  • the neighboring communication device sends a fourth request message by using a broadcast mode, where the fourth request message is used to request the designated communication device to return feedback information carrying the identification information of the communication device when receiving the fourth request message.
  • the fourth request message carries the identifier information of the neighboring communication device and the identifier information of the designated communication device;
  • an embodiment of the present invention provides a device for discovering a relay node, including:
  • a first determining module configured to determine that a communication target that needs to communicate with itself is not adjacent to itself
  • a sending module configured to send a relay request, where the relay request is used to request a neighboring communication device adjacent to itself as a relay node between the communication targets, and the relay request carries at least the communication target Identification information;
  • a second determining module configured to determine, according to the received relay reply message returned by the neighboring communication device, whether the near-communication device is capable of acting as a relay node between itself and the communication target.
  • the embodiment of the present invention provides a solution to the problem of proximity discovery between the communication parties and the communication device supporting the relay capability, that is, the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; the communication initiator Sending a relay request for requesting a neighboring communication device adjacent to itself as a relay node between itself and a communication target; the communication initiator determines according to the relay reply message returned by the received neighboring communication device Whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the sending module is specifically configured to: send the relay request by using a broadcast manner, and the relay request carries the self-identification information and the identifier information of the communication target party;
  • the second determining module is specifically configured to: if receiving a relay reply message returned by the neighboring communication device, determining that the neighboring communication device can act as a relay node between the self and the communication target, the relay The reply message carries the identification information of the neighboring communication device.
  • the second determining module is further configured to:
  • the sending module is specifically configured to: send the relay request to each of the neighboring communication devices, and the relay request carries the identifier information of the communication target party;
  • the second determining module is specifically configured to: if the relay reply message returned by the neighboring communication device carries a first indication for indicating that it can serve as a relay node between the communication initiator and the communication target Information, determining that the neighboring communication device can act as a relay node between itself and the communication target party; if the relay reply message returned by the neighboring communication device is carried to indicate that the communication device cannot be used as the communication initiator
  • the second indication information of the relay node between the communication target parties determines that the near-communication device cannot be a relay node between itself and the communication target party.
  • the sending module is further configured to:
  • the relay request is sent to each of the neighboring communication devices supporting the relay capability, wherein the relay capability refers to the ability of the communication device to currently act as a relay node between other communication devices other than itself.
  • the embodiment of the present invention further provides a device adjacent to a communication initiator, including: a determining module, configured to determine, according to the relay request, whether the current relay node can be used as a relay node between the communication initiator and the communication target, after receiving the relay request sent by the communication initiator Carrying at least the identification information of the communication target party in the request;
  • a processing module configured to determine, according to the determination result of the determining module, whether to return a relay reply message to the communication initiator.
  • the embodiment of the present invention provides a solution to the problem of proximity discovery between the communication parties and the communication device supporting the relay capability, that is, the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; the communication initiator Sending a relay request for requesting a neighboring communication device adjacent to itself as a relay node between itself and a communication target; the communication initiator determines according to the relay reply message returned by the received neighboring communication device Whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the processing module is specifically configured to:
  • the relay request carries the identifier information of the communication initiator and the identifier information of the communication target, then:
  • the relay request is discarded when it is determined that it is currently not a relay node between the communication initiator and the communication target.
  • the processing module is specifically configured to:
  • the relay capability refers to the ability of the communication device to currently act as a relay node between communication devices other than itself, then:
  • a relay reply message carrying the first indication information, the first indication information, when determining that the relay node is the relay node between the communication initiator and the communication target party. Used to indicate that it can act as a relay node between the communication initiator and the communication target;
  • a relay reply message carrying the second indication information, the second indication information, when determining that the relay node between the communication initiator and the communication target is not currently available. It is used to indicate that it cannot be a relay node between the communication initiator and the communication target.
  • the determining module is specifically configured to:
  • the relay capability refers to a capability that the communication device can currently act as a relay node between other communication devices except itself.
  • the determining module is specifically configured to:
  • an embodiment of the present invention provides a discovery device for a relay node, including:
  • a first processor configured to determine that a communication target that needs to communicate with itself is not adjacent to itself
  • a sending port configured to send a relay request, where the relay request is used to request a neighboring communication device adjacent to itself as a relay node between itself and the communication target party, and the relay request carries at least Describe the identification information of the communication target party;
  • a second processor configured to determine, according to the received relay reply message returned by the neighboring communication device, whether the neighboring communication device can act as a relay node between itself and the communication target party.
  • the embodiment of the present invention provides a solution to the problem of proximity discovery between the communication parties and the communication device supporting the relay capability, that is, the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; the communication initiator Sending a relay request for requesting a neighboring communication device adjacent to itself as a relay node between itself and a communication target; the communication initiator determines according to the relay reply message returned by the received neighboring communication device Whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the sending port is specifically configured to: send the relay request by using a broadcast manner, and the relay request carries the self-identification information and the identifier information of the communication target party;
  • the second processor is specifically configured to: if receiving a relay reply message returned by the neighboring communication device, determining that the neighboring communication device can act as a relay node between the self and the communication target, the relay The reply message carries the identification information of the neighboring communication device.
  • the second processor is further configured to:
  • the sending port is specifically configured to: send the relay request to each of the neighboring communication devices, and the relay request carries identifier information of the communication target party;
  • the second processor is specifically configured to: if the relay reply message returned by the neighboring communication device carries a first indication for indicating that it can serve as a relay node between the communication initiator and the communication target Information, determining that the neighboring communication device can act as a relay node between itself and the communication target party; if the relay reply message returned by the neighboring communication device is carried to indicate that the communication device cannot be used as the communication initiator
  • the second indication information of the relay node between the communication target parties determines that the neighboring communication device cannot serve as a relay node between itself and the communication target party.
  • the sending port is further configured to:
  • the relay request is transmitted to each of the neighboring communication devices supporting the relay capability, wherein the relay capability refers to the ability of the communication device to currently act as a relay node between other communication devices other than itself.
  • the embodiment of the present invention further provides a device adjacent to a communication initiator, including:
  • a processor configured to determine, according to the relay request, whether it is currently a relay node between the communication initiator and the communication target, after receiving the relay request sent by the communication initiator, And carrying the identification information of the communication target party in the request, and determining, according to the determination result of the determining module, whether to forward the reply message to the communication initiator.
  • the embodiment of the present invention provides a solution to the problem of proximity discovery between the communication parties and the communication device supporting the relay capability, that is, the communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; the communication initiator Sending a relay request for requesting a neighboring communication device adjacent to itself as a relay node between itself and a communication target; the communication initiator determines according to the relay reply message returned by the received neighboring communication device Whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the processor is specifically configured to:
  • the relay request carries the identifier information of the communication initiator and the identifier information of the communication target, then:
  • the relay request is discarded when it is determined that it is currently not a relay node between the communication initiator and the communication target.
  • the processor is specifically configured to:
  • the relay request carries the identification information of the communication target, where the relay capability refers to that the communication device can currently act as a relay node between other communication devices except itself.
  • a relay reply message carrying the first indication information, the first indication information, when determining that the relay node is the relay node between the communication initiator and the communication target party. Used to indicate that it can act as a relay node between the communication initiator and the communication target;
  • a relay reply message carrying the second indication information, the second indication information, when determining that the relay node between the communication initiator and the communication target is not currently available. It is used to indicate that it cannot be a relay node between the communication initiator and the communication target.
  • the processor is specifically configured to:
  • the relay capability is not supported by itself, or is not adjacent to the communication target, it is determined that it is not currently acting as a relay node between the communication initiator and the communication target;
  • the relay capability refers to a capability that the communication device can currently act as a relay node between other communication devices other than itself.
  • the processor is specifically configured to:
  • FIG. 1 is a schematic diagram of a data channel of inter-device communication defined by 3GPP in the background art
  • FIG. 2 is a schematic diagram of a data transmission path of a first proximity communication in the background art
  • FIG. 3 is a schematic diagram of a data transmission path of a second proximity communication in the background art
  • FIG. 4 is a schematic diagram of a control path when a UE performing proximity communication is located in a network coverage and a serving base station is the same in the background art;
  • FIG. 5 is a control path of a UE performing proximity communication in a network coverage and different serving base stations in the background art.
  • FIG. 6 is a schematic diagram of a control path for performing proximity communication by a public safety UE in a scenario without network coverage in the background art
  • FIG. 7 is a schematic diagram of data transmission between a public safety UE that is not adjacent to each other by a relay node according to an embodiment of the present invention
  • FIG. 8 is a process of a communication initiator side in a discovery process of a relay node according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a processing procedure of a neighboring communication device side adjacent to a communication initiator side in a discovery process of a relay node according to an embodiment of the present disclosure
  • FIG. 10 is a schematic diagram of an application scenario according to Embodiment 1 of the present invention.
  • FIG. 11 is a schematic diagram of a processing procedure according to Embodiment 1 of the present invention.
  • FIG. 12 is a schematic diagram of an application scenario of Embodiment 2 according to the present invention.
  • FIG. 13 is a schematic diagram of a processing procedure of Embodiment 2 provided by the present invention.
  • FIG. 14 is a schematic diagram of an application scenario according to Embodiment 3 of the present invention.
  • Embodiment 15 is a schematic diagram of a processing procedure of Embodiment 3 provided by the present invention.
  • FIG. 16 is a first schematic structural diagram of a device for discovering a relay node according to an embodiment of the present invention
  • FIG. 17 is a schematic diagram of a first structure of a device adjacent to a communication initiator according to an embodiment of the present invention.
  • FIG. 18 is a second schematic structural diagram of a device for discovering a relay node according to an embodiment of the present invention
  • FIG. 19 is a schematic diagram of a second structure of a device adjacent to a communication initiator according to an embodiment of the present invention. detailed description
  • the communication initiator may be a terminal (such as a legacy UE, a public security UE, or the like), or may be a network side device (such as a base station, etc.);
  • the communication target party may be a terminal (such as a legacy UE, a public safety UE, etc.), or may be a network side device (such as a base station, etc.);
  • the communication device may be a terminal (such as a legacy UE, a public safety UE, etc.) or a network side device (such as a base station, etc.);
  • the proximity communication device may be a terminal (such as a legacy UE, a public safety UE, etc.), or may be a network side device (such as a base station, etc.);
  • the communication device capable of acting as a relay node between the communication initiator and the communication target is public safety
  • the UE includes but is not limited to a mobile station (MS), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset), and a portable device.
  • MS mobile station
  • Mobile Terminal mobile terminal
  • Mobile Telephone mobile telephone
  • handset mobile phone
  • the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular," telephone)
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or "cellular," telephone)
  • the computer with wireless communication function, etc. the user equipment can also be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device.
  • a base station may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be configured to convert the received air frame and the IP packet into a router between the wireless terminal and the rest of the access network, wherein the rest of the access network can include an internet protocol.
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.
  • the relay capability in the embodiment of the present invention refers to a capability that the communication device can currently serve as a relay node between other communication devices except itself;
  • the communication device can currently act as a relay node between communication devices other than itself when the communication device currently satisfies all of the following conditions:
  • the communication device has a relay function capable of acting as a relay node between communication devices other than itself;
  • the network authorizes the communication device to act as a relay node between other communication devices other than itself;
  • the relay function of the communication device is activated, for example, the relay capability of the communication device is turned on by the user or the system. Further, if the communication device does not satisfy the at least one condition, the communication device does not support the relay capability.
  • Preferred application scenarios of the embodiments of the present invention include:
  • Both sides of the communication are terminals, and both sides of the communication are under network coverage and are not adjacent;
  • Both the communication terminals are terminals, at least one of which is not within the network coverage and the communication parties are not adjacent;
  • One of the two communication terminals is a terminal, and one is a network side device (such as a base station), and the terminal is not within the coverage of the network, that is, the communication parties are not adjacent.
  • a network side device such as a base station
  • the communication parties are not adjacent to each other and further includes the following situations: the communication initiator determines that the communication target is not adjacent to the communication target according to the result of the proximity discovery; or, the communication parties have established the proximity communication. And the communication initiator determines that the received signal strength of the communication target is less than the set strength threshold; or, the communication parties have established the proximity communication and the communication initiator determines that the distance between itself and the communication target is greater than the set distance threshold.
  • Figure 7 illustrates an embodiment of a public safety UE supporting relay capability to relay data between two non-contiguous public safety UEs.
  • the public safety UE1 and the public safety UE2 are not adjacent, the public safety UE3 and the public safety UE1 are adjacent, and the public safety UE3 and the public safety UE2 are adjacent to each other, and the public safety UE3 supports the relay capability.
  • the public safety UE1 wants to communicate with the public safety UE2, it is found that the public safety UE2 is not adjacent to itself.
  • the public safety UE3 can be used as a relay node of the current communication, and is forwarded between the public safety UE 1 and the public safety UE2. data.
  • the process of the communication initiator side in the process of discovering the relay node specifically includes:
  • Step 81 The communication initiator determines that the communication target party that needs to communicate with itself is not adjacent to itself; for example, the communication initiator is terminal A, and it wants to establish communication with terminal B (communication target party), but terminal A and The terminal B is not adjacent to each other; for example, the communication initiator is the terminal A, which is located in the E-UTRAN, and the connection between the terminal A and the eNB1 is established, and then the terminal A moves out of the evolved universal mobile communication system terrestrial radio access network.
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • UMTS Universal Mobile Telecommunications System
  • the terminal A still wants to communicate with the eNB1 (communication target), at this time, the terminal A and the eNB1 are not adjacent;
  • the communication initiator is eNB1, which wants to communicate with terminal A (communication target), but terminal A is not within the coverage of E-UTRAN, that is, terminal A and eNB1 are not adjacent.
  • Step 82 The communication initiator sends a relay request, where the relay request is used to request a neighboring communication device adjacent to itself as a relay node between itself and the communication target, and the relay request carries at least the communication target Identification information;
  • Step 83 The communication initiator determines, according to the received relay reply message returned by the neighboring communication device, whether the neighboring communication device can act as a relay node between itself and the communication target.
  • the proximity discovery of the communication initiator based on the broadcast message includes the following two implementation forms:
  • the communication initiator determines each of the neighboring communication devices (ie, the communication device adjacent to the communication initiator) according to the following steps:
  • the communication initiator sends a first request message by using a broadcast method, where the first request message is used to request each neighboring communication device to return feedback information carrying the identification information of the neighboring communication device to itself, and the first request message carries the communication initiation Identification information of the party;
  • the communication initiator determines that the communication device corresponding to the identifier information carried in the received feedback information is a neighboring communication device.
  • the communication device adjacent to the communication initiator can receive the first request message sent by the communication initiator, and after receiving the first request message, send the message to the communication requester.
  • Initiator return The feedback information carries the self-identification information; the communication device not adjacent to the communication initiator does not receive the first request message sent by the communication device.
  • the communication initiator After receiving the feedback information returned by the neighboring communication device, the communication initiator stores the identification information of each neighboring communication device locally; for example, the communication initiator stores the acquired identification information of each neighboring communication device in the vicinity. In the list of relationships.
  • the communication initiator when the communication initiator initiates communication with the communication target, it first determines whether it is adjacent to the communication target according to the stored identification information of the neighboring communication device, and initiates proximity when determining that it is adjacent to the communication target. Communication; initiates a discovery process of the relay node when it is determined that it is not adjacent to the communication target.
  • Mode B The communication initiator determines whether it is adjacent to the designated communication device according to the following steps:
  • the communication initiator sends a second request message by using a broadcast method, where the second request message is used to request the designated communication device to return feedback information carrying the own identification information after receiving the second request message, and the second request message carries the second request message.
  • the communication initiator determines that it is adjacent to the designated communication device;
  • the communication initiator determines that it is not adjacent to the designated communication device.
  • each neighboring communication device of the communication initiator receives the second request message sent by the communication initiator, and each neighboring communication device receives the second request message. And determining whether the identity information is the same as the identity information of the designated communication device carried in the second request message, and performing corresponding processing according to the determination result:
  • the neighboring communication device If the self-identification information is the same as the identification information of the designated communication device carried in the second request message, the neighboring communication device returns feedback information to the communication initiator, and carries the self-identification information in the feedback information;
  • the neighboring communication device discards the current broadcast message.
  • the communication initiator After receiving the feedback information returned by the designated communication device, the communication initiator stores the identification information of the designated communication device locally; for example, the communication initiator will obtain the designated communication device adjacent to each other.
  • the identification information is stored in the proximity relationship list.
  • the communication initiator when the communication initiator initiates communication with the communication target, it first determines whether it is adjacent to the communication target according to the stored identification information of the neighboring communication device, and when determining that it is adjacent to the communication target, the initiation unit Near communication; initiates a discovery process of a relay node when it is determined that it is not adjacent to the communication target.
  • the communication initiator may obtain the identification information of each neighboring communication device in advance, and determine whether it is based on the acquired identification information of each neighboring communication device when the communication with the communication target party needs to be initiated. Adjacent to the communication target;
  • the communication initiator may also send the first request message by means of a broadcast to obtain the identification information of each neighboring communication device, and further determine according to the acquired identification information of each neighboring communication device. Whether it is adjacent to the communication target;
  • the communication initiator may also send a second request message (the second request message carries its own identification information and the identification information of the communication target party) in a broadcast manner when the communication with the communication target party needs to be initiated, according to whether the feedback information is received. Determining whether it is adjacent to the communication target, that is, if the feedback information is received and the identification information carried in the feedback information is the same as the identification information of the communication target, it is determined that it is adjacent to the communication target; if no feedback is received The information, or although the feedback information is received but the identification information carried in the feedback information is different from the identification information of the communication target, it is determined that it is not adjacent to the communication target.
  • the communication initiator is configured with a dedicated spectrum for transmitting broadcast messages, and the specific negotiation and allocation mechanism for the resources required to transmit the broadcast message can be implemented at the physical layer.
  • step 82 the communication initiator sends a relay request, including the following two methods:
  • Method A The communication initiator sends the relay request by means of a broadcast, and the relay request carries the identity information of the identity and the identity information of the communication target.
  • the communication initiator determines, according to the received relay reply message sent by the neighboring communication device, whether the neighboring communication device can act as a relay node between the user and the communication target, and specifically includes:
  • the communication initiator When receiving the relay reply message returned by the neighboring communication device, the communication initiator determines that the neighboring communication device can act as a relay node between itself and the communication target party, and the relay reply message carries the identifier of the neighboring communication device information.
  • the communication initiator after receiving the relay reply message sent by the neighboring communication device, the communication initiator further includes:
  • the communication initiator stores the identification information of the neighboring communication device carried in the received relay reply message, so that the neighboring communication device corresponding to the locally stored identification information is all that the communication initiator discovers and can act as the current communication (the communication initiator and the A relay node that communicates between communication targets.
  • the communication initiator forms a priority list according to the strength of the signal strength of each of the near communication devices that can be used as the relay node of the current communication, and the list is provided by each neighboring node that can serve as the relay node of the current communication.
  • the identification information of the communication device is composed. The higher the priority of the identification information in the list, the stronger the signal strength of the neighboring communication device corresponding to the identification information received by the communication initiator.
  • the communication initiator may only receive a relay reply message sent by a neighboring communication device, or may receive a relay reply message sent by multiple neighboring communication devices, and may not receive any relay reply message.
  • the communication initiator does not receive any relay reply message, it is determined that there is currently no neighboring communication device capable of acting as a relay node between itself and the communication target, and the processing is terminated.
  • Method B the communication initiation direction sends the relay request to each of the neighboring communication devices (ie, the communication device adjacent to the communication initiator), and the relay request carries the identification information of the communication target party;
  • the communication initiator determines, according to the received relay reply message sent by the neighboring communication device, whether the neighboring communication device can act as a relay node between the user and the communication target, and specifically includes:
  • the communication initiator determines that the proximity communication device can communicate as itself and a relay node between the target parties;
  • the communication initiator determines that the neighboring communication device cannot communicate as itself A relay node between the target parties.
  • method B further includes:
  • Method B1 The communication initiator selects a neighboring communication device from all the neighboring communication devices according to the priority of each neighboring communication device from high to low, and sends the relay request to the selected neighboring communication device; the communication After receiving the relay reply message returned by the selected neighboring communication device, the initiating device selects a neighboring communication device from the remaining neighboring communication devices, and sends the relay request to the selected neighboring communication device, and so on. Until the communication initiator determines that the currently selected neighboring communication device is the lowest priority neighboring communication device.
  • the priority of each neighboring communication device may be divided according to the strength of the signal strength of each neighboring communication device received by the communication initiator in the proximity discovery process. For example, the stronger the signal strength, the higher the priority. .
  • Method B2 The communication initiation direction sends the relay request to all neighboring communication devices.
  • the communication initiator after receiving the relay reply message sent by the neighboring communication device, the communication initiator further includes:
  • the communication initiator stores the identification information of each neighboring communication device that can serve as the relay node of the current communication, so that the neighboring communication device corresponding to the locally stored identification information is the one that the communication initiator discovers and can serve as the communication (the communication initiator) A relay node that communicates with the communication target).
  • the communication initiator forms a priority list according to the strength of the signal strength of each of the near communication devices that can be used as the relay node of the current communication, and the list is provided by each neighboring node that can serve as the relay node of the current communication.
  • the identification information of the communication device is composed. The higher the priority of the identification information in the list, the stronger the signal strength of the neighboring communication device corresponding to the identification information received by the communication initiator.
  • Method C The communication initiation direction sends the relay request to each of the neighboring communication devices that support the relay capability.
  • the communication initiator sends a relay reply message according to the received neighboring communication device. Determining whether the neighboring communication device can act as a relay node between itself and the communication target, specifically includes: if the relay reply message returned by the neighboring communication device is carried to indicate that it can be used as a communication initiator and the communication target The first indication information of the relay node, the communication initiator determines that the neighboring communication device can act as a relay node between itself and the communication target party;
  • the communication initiator determines that the neighboring communication device cannot communicate as itself A relay node between the target parties.
  • method C further includes:
  • the communication initiator selects a neighboring communication device supporting the relay capability from all the neighboring communication devices in descending order of priority of each neighboring communication device, and sends the neighboring communication device to the selected neighboring communication device.
  • the communication initiating device selects a neighboring communication device supporting the relay capability from the remaining neighboring communication devices, and sends the neighboring communication device to the selected neighboring device.
  • the communication device transmits the relay request, and so on, until the communication initiator determines that the currently selected neighboring communication device is the lowest priority and the relay capable neighboring communication device.
  • the priority of each neighboring communication device may be divided according to the strength of the signal strength of each neighboring communication device received by the communication initiator in the proximity discovery process. For example, the stronger the signal strength, the higher the priority. .
  • Method C2 The communication initiation direction sends the relay request to all neighboring communication devices that support the relay capability.
  • the first request message in the mode A is further used to request each neighboring communication device to indicate whether it supports the relay capability in the returned feedback information, so that the communication initiator can know whether each neighboring communication device supports the relay capability. ;
  • the proximity communication device can indicate whether it supports the relay capability by:
  • Mode 1 if the neighboring communication device supports the relay capability, the feedback information returned to the communication initiator carries its own identification information and indication information indicating that the proximity communication device supports the relay capability; if the proximity communication device If the relay capability is not supported, the feedback information returned to the communication initiator only carries its own identification information; or, mode 2, if the neighboring communication device supports the relay capability, in the feedback information returned to the communication initiator Carrying the identification information of the own and the indication information for indicating that the neighboring communication device supports the relay capability; if the neighboring communication device does not support the relay capability, carrying the identification information returned by the communication initiator and carrying the identification information thereof The indication information indicating that the neighboring communication device does not support the relay capability.
  • the second request message in the mode B is further used to request the designated communication device to indicate whether it supports the relay capability in the returned feedback information, so that the communication initiator can know whether each designated communication device supports the relay capability.
  • the specified communication device can indicate whether it supports the relay capability by using mode 1 or mode 2.
  • the communication initiator After acquiring the neighboring communication devices and whether they support the relay capability, the communication initiator stores the identification information of each neighboring communication device and whether the neighboring communication device supports the relay capability, and then determines the need at the communication initiator.
  • the communication initiator When initiating the discovery process of the relay node, it is only necessary to send a relay request to each neighboring communication device supporting the relay capability.
  • the stored information of the neighboring communication device includes the identifier information of the neighboring communication device and the indication information indicating that the neighboring communication device supports the relay capability;
  • the communication device does not support the relay capability, and the stored information of the neighboring communication device only includes the identification information of the neighboring communication device;
  • the stored information of the neighboring communication device includes the identification information of the neighboring communication device and the indication information indicating that the neighboring communication device supports the relay capability; if the neighboring communication device does not The relay capability is supported, and the stored information of the neighboring communication device includes identification information of the neighboring communication device and indication information indicating that the neighboring communication device does not support the relay capability.
  • the communication initiator after receiving the relay reply message sent by the neighboring communication device, the communication initiator further includes:
  • the communication initiator stores the identification information of each neighboring communication device that can serve as the relay node of the current communication, so that the neighboring communication device corresponding to the locally stored identification information is the one that the communication initiator discovers and can serve as the communication (the communication initiator) A relay node that communicates with the communication target).
  • the communication initiator forms a priority list according to the strength of the signal strength of each of the neighboring communication devices that can be used as the relay node of the current communication, and the list is provided by each neighboring node that can serve as the relay node of the current communication.
  • the identification information of the communication device is composed. The higher the priority of the identification information in the list, the stronger the signal strength of the neighboring communication device corresponding to the identification information received by the communication initiator.
  • the identification information of the communication device (such as the communication initiator, the communication target party, the neighboring communication device, etc.) is globally unique, and may be the identification information defined in the existing 3GPP protocol, or may be a newly defined dedicated information. Identification information).
  • the neighboring communication device capable of acting as a relay node between the communication initiator and the communication target in the embodiment of the present invention is a public safety user equipment UE.
  • the embodiment of the present invention further provides a process of the neighboring communication device side adjacent to the communication initiator in the process of the discovery of the relay node.
  • the process specifically includes:
  • Step 91 After receiving the relay request sent by the communication initiator, the neighboring communication device adjacent to the communication initiator determines, according to the relay request, whether it is currently a relay node between the communication initiator and the communication target.
  • the relay request carries at least the identification information of the communication target party;
  • Step 92 The neighboring communication device determines, according to the determination result, whether to return a relay reply message to the communication initiator.
  • the communication initiator sends the relay request by using the method A, where the relay request carries the identification information of the communication initiator and the identification information of the communication target, then: in step 92, the neighboring communication device according to the determination result Determine whether to return a relay reply message to the communication initiator, including:
  • the neighboring communication device determines that it is currently capable of acting as a relay node between the communication initiator and the communication target party, the neighboring communication device returns a relay reply message to the communication initiator, where the relay reply message carries its own identification information;
  • the neighboring communication device discards the current relay request when it determines that it is currently not a relay node between the communication initiator and the communication target.
  • Step 92 The neighboring communication device determines, according to the judgment result, whether to return a relay reply message to the communication initiator, which specifically includes:
  • the communication initiator When the neighboring communication device determines that it is currently capable of acting as a relay node between the communication initiator and the communication target, the communication initiator returns a relay reply message carrying the first indication information, where the first indication information is used to indicate itself Can act as a relay node between the communication initiator and the communication target;
  • the neighboring communication device determines that it is not currently the relay node between the communication initiator and the communication target party, it returns a relay reply message carrying the second indication information to the communication initiator, where the second indication information is used to indicate itself Cannot be used as a relay node between the communication initiator and the communication target.
  • the neighboring communication device determines whether it can currently act as a relay node between the communication initiator and the communication target according to the following steps:
  • the neighboring communication device determines that it is currently capable of acting as a relay node between the communication initiator and the communication target;
  • the neighboring communication device determines that it is currently unable to act as a relay node between the communication initiator and the communication target.
  • the neighboring communication device adjacent to the communication initiator may first determine whether it supports the relay capability, and then determine whether it is adjacent to the communication target party; the neighboring communication device may also first determine itself and the communication target party. Whether it is adjacent, and then determine whether it supports relay capability.
  • the neighboring communication device adjacent to the communication initiator determines whether it can act as a communication initiator according to a preset determination condition after determining that it supports the relay capability and is adjacent to the communication target. a relay node between communication targets;
  • the neighboring communication device determines that it can act as a relay node between the communication initiator and the communication target party;
  • the neighboring communication device determines that it cannot act as a relay node between the communication initiator and the communication target.
  • the predetermined judgment conditions include one or a combination of the following: Pre-set user preferences, their current processing load, and the strength of the signal they receive the communication target.
  • the preset user preference may indicate that the neighboring communication device can act as a relay node of any communication party, and may also indicate that the neighboring communication device can act as a relay node between the designated communication initiator and the designated communication target. It is also possible to indicate that the neighboring communication device cannot be a relay node of either communication party.
  • the neighboring communication device that is adjacent to the communication initiator determines whether it can act as a relay node between the communication initiator and the communication target according to the current processing load of the communication initiator.
  • the current processing load of the neighboring communication device is too heavy, that is, the current processing load of the neighboring communication device exceeds a set threshold (eg, the neighboring communication device has connected more than a set number of communication devices; for example, the neighboring communication device is currently If the CPU usage exceeds the set threshold), it is determined that it cannot be the relay node between the communication initiator and the communication target;
  • a set threshold eg, the neighboring communication device has connected more than a set number of communication devices; for example, the neighboring communication device is currently
  • the current processing load of the neighboring communication device does not exceed the set threshold, it is determined that it can act as a relay node between the communication originator and the communication target.
  • the neighboring communication device acts as a relay node between the communication initiator and the communication target at this time (that is, forwarding data between the communication initiator and the communication target), This will greatly affect the processing performance of the neighboring communication device.
  • the neighboring communication device that is adjacent to the communication initiator determines whether it can act as a relay node between the communication initiator and the communication target according to the strength of the signal of the communication target.
  • the proximity communication device determines that the strength of the signal of the communication target party is not less than a set threshold, it is determined that it can serve as a relay node between the communication initiator and the communication target party;
  • the neighboring communication device determines that the strength of the signal of the communication target is less than the set threshold, it determines that it is not a relay node between the communication initiator and the communication target.
  • the neighboring communication device acts as a relay node between the communication initiator and the communication target at this time (ie, at the communication initiator and Data is forwarded between communication targets), which tends to cause instability in data transmission.
  • the neighboring communication device may determine whether it is adjacent to the communication target according to the result of the proximity discovery initiated by the neighboring communication device, where the proximity discovery process includes:
  • the proximity communication device determines the communication device adjacent to itself according to the following steps:
  • the proximity communication device sends a third request message by using a broadcast method, and the third request message is used to request the communication device adjacent to itself to send the carrier to itself.
  • the feedback information of the identification information of the communication device, and the third request message carries the identification information of the neighboring communication device;
  • the neighboring communication device determines that the communication device corresponding to the identifier information carried in the received feedback information is adjacent to itself. In this manner, after the neighboring communication device sends the third request message, the communication device adjacent to the neighboring communication device can receive the third request message sent by the neighboring communication device, and after receiving the third request message, The communication device returns feedback information, where the feedback information carries its own identification information; the communication device not adjacent to the neighboring communication device does not receive the third request message sent by the communication device.
  • the neighboring communication device that is adjacent to the communication initiator may first determine whether it is adjacent to the communication target according to the stored identification information of the neighboring communication device; After determining that the communication device is adjacent to the communication target, the communication device determines whether it supports the relay capability, and sends a relay reply message to the communication initiator when determining that it supports the relay capability; otherwise, the current relay request is discarded.
  • the proximity communication device determines whether it is adjacent to the designated communication device according to the following steps:
  • the neighboring communication device sends a fourth request message by using a broadcast method, where the fourth request message is used to request the specified communication device that is adjacent to the device to send the feedback information that carries the identification information of the communication device, and the fourth request message carries the Identification information of the proximity communication device and identification information of the designated communication device;
  • the proximity communication device determines that it is adjacent to the designated communication device;
  • the proximity communication device determines that it is not adjacent to the designated communication device.
  • the communication device adjacent to the neighboring communication device receives the fourth request message sent by the neighboring communication device, and each communication device adjacent to the neighboring communication device receives the message.
  • the fourth request message determining whether the identity information is the same as the identity information of the designated communication device carried in the fourth request message, and performing corresponding processing according to the determination result:
  • the communication device If the self-identification information is the same as the identification information of the designated communication device carried in the fourth request message, the communication device returns feedback information to the neighboring communication device, and carries the self-identification information in the feedback information;
  • the communication device discards the current broadcast message.
  • the neighboring communication device that is adjacent to the communication initiator may first determine whether it is adjacent to the communication target according to the stored identification information of the neighboring communication device; After determining that the communication device is adjacent to the communication target, the communication device determines whether it supports the relay capability, and sends a relay reply message to the communication initiator when determining that it supports the relay capability; otherwise, the current relay request is discarded.
  • the neighboring communication device adjacent to the communication initiator may obtain the communication adjacent thereto in advance.
  • the neighboring communication device that is adjacent to the communication initiator may also send the third request message by broadcast to obtain the identification information of each communication device adjacent thereto when receiving the relay request of the communication initiator, and further obtain the identification information according to the acquired Identification information of neighboring communication devices, determining whether itself is adjacent to the communication target;
  • the neighboring communication device that is adjacent to the communication initiator may also send a fourth request message (the fourth request message carries the identity information of the user and the identity information of the communication target party) when receiving the relay request of the communication initiator. Determining whether it is adjacent to the communication target according to whether the feedback information is received, that is, if the feedback information is received and the identification information carried in the feedback information is the same as the identification information of the communication target, determining that the user is adjacent to the communication target If no feedback information is received, or although the feedback information is received but the identification information carried in the feedback information is different from the identification information of the communication target, it is determined that it is not adjacent to the communication target.
  • the specific negotiation and allocation mechanism of the resources required by the proximity communication device to configure the dedicated frequency transmission broadcast message for transmitting the broadcast message can be implemented at the physical layer.
  • the proximity of the proximity communication device to the communication target includes the following:
  • the neighboring situations include: the neighboring communication device determines that it is currently adjacent to the communication target according to the result of the proximity discovery; or, the neighboring communication device and the communication target have established proximity communication; One is a network side device, and the other is a terminal, and the terminal is in the coverage of the network side device, and the terminal is adjacent to the network side device.
  • the proximity communication device is not adjacent to the communication target includes the following conditions:
  • the neighboring communication device determines that the current communication device is not adjacent to the communication target according to the result of the proximity discovery; or, the proximity communication device and the communication target have established proximity communication and The proximity communication device determines that the received signal strength of the communication target is less than the set strength threshold; or the proximity communication device has established proximity communication with the communication target and the proximity communication device determines that the distance between itself and the communication target is greater than Set distance threshold;
  • one of the two parties is a network side device and one is a terminal, and the terminal is not in the coverage of the network, the terminal is not adjacent to the network side device.
  • the following describes the discovery method of the relay node provided by the present invention in detail by using three specific embodiments.
  • the following embodiments are described by taking the terminal as the communication initiator as an example, and the communication initiator is a network side device (such as a base station). Similar to this, here is no longer - an example.
  • Embodiment 1 In this embodiment, UE1 (communication initiator) wishes to initiate communication to UE5 (communication target). At this time, UE1 and UE5 are not adjacent, and UE1 finds that UE3 can serve as the communication through the discovery method of the relay node. Relay node.
  • the scenario in this embodiment is shown in FIG. 10, and specifically:
  • the communication device adjacent to UE1 includes UE2, UE3, and UE4;
  • the communication device adjacent to the UE3 includes the UE1 and the UE5;
  • the communication device adjacent to UE4 includes UE1 and UE5;
  • Communication devices supporting relay capability include UE2 and UE3.
  • the process of discovering a relay node is as shown in FIG. 11 , and specifically includes:
  • Step 111 The UE1 broadcasts a relay request message, where the parameters carried in the relay request message are an identifier of the UE that sends the broadcast message (ie, the identifier of the UE1) and an identifier of the communication target (ie, the identifier of the UE5).
  • the parameters carried in the relay request message are an identifier of the UE that sends the broadcast message (ie, the identifier of the UE1) and an identifier of the communication target (ie, the identifier of the UE5).
  • step 112a the UE2 supports the relay capability, and the UE2 is not adjacent to the UE5, and the UE2 discards the current broadcast message.
  • step 112b the UE3 supports the relay capability and the UE3 is adjacent to the UE5, and the UE3 returns a relay reply message to the UE1, where the message is carried.
  • the parameter is the identifier of UE3;
  • Step 112c The UE4 does not support the relay capability, and the UE4 discards the broadcast message.
  • UE1 receives a relay reply message (ie, a relay reply message returned by UE3). According to the identifier carried in the relay reply message, UE1 finds that the relay node that can communicate with UE5 is UE3.
  • a relay reply message ie, a relay reply message returned by UE3
  • the process of determining whether the UE 3 is adjacent to the UE 5 is as follows:
  • the UE3 broadcaster is a request message, and the parameters carried by the proximity request message are the identifier of the UE3 and the identifier of the UE5.
  • both the UE1 and the UE5 that are adjacent to the UE3 can receive the proximity request message, because the identifier of the UE1 is not in the proximity request message.
  • the UE1 discards the neighboring request message; the UE5 returns a neighboring reply message to the UE3, and the parameter carried by the neighboring reply message is the identifier of the UE5; and further, the UE3 receives the neighboring reply according to the neighboring request message.
  • the message knows that it is adjacent to UE5.
  • Embodiment 2 In this embodiment, UE1 (communication initiator) wishes to initiate communication to UE5 (communication target party), and UE1 and UE5 are not adjacent at this time, and UE1 discovers UE2, UE3, and UE4 through the discovery method of the relay node. Can act as a relay node for this communication.
  • UE1 communication initiator
  • UE5 communication target party
  • UE1 and UE5 are not adjacent at this time
  • UE1 discovers UE2, UE3, and UE4 through the discovery method of the relay node.
  • FIG 12 The scenario in this embodiment is shown in Figure 12, specifically:
  • the communication device adjacent to UE1 includes UE2, UE3, and UE4;
  • the communication device adjacent to UE2 includes UE1 and UE5;
  • the communication device adjacent to UE3 includes UE1 and UE5;
  • the communication device adjacent to UE4 includes UE1 and UE5;
  • Communication devices supporting relay capabilities include UE2, UE3, and UE4.
  • Figure 13 the discovery process of the relay node is shown in Figure 13, which specifically includes:
  • Step 131 The UE1 broadcasts a relay request message, where the parameters carried by the relay request message are an identifier of the UE that sends the broadcast message (ie, the identifier of the UE1) and an identifier of the communication target (ie, the identifier of the UE5).
  • the parameters carried by the relay request message are an identifier of the UE that sends the broadcast message (ie, the identifier of the UE1) and an identifier of the communication target (ie, the identifier of the UE5).
  • the UE3 supports the relay capability and the UE3 is in the vicinity of the UE5, and the UE3 returns a relay reply message to the UE1, and the parameter carried by the message is the identifier of the UE3;
  • the UE4 supports the relay capability and the UE4 is adjacent to the UE5. Then, the UE4 returns a relay reply message to the UE1, and the parameter carried by the message is the identifier of the UE4.
  • UE1 receives three relay reply messages. Therefore, UE1 finds that the relay nodes that can communicate with UE5 are UE2, UE3, and UE4.
  • UE2, UE3, and UE4 determine whether the process is adjacent to the UE5, and the process of determining whether the UE3 is adjacent to the UE5 in the first embodiment is similar to that of the UE3, and is not described here.
  • the communication initiator is the UE1
  • the communication target is the eNodeB (the eNB) in the E-UTRAN.
  • the specific scenario is as shown in FIG. 14.
  • the UE1 is located in the coverage range of the E-UTRAN, A connection is established between the UE1 and the eNodeB 1, and data is being exchanged with each other. Then, the UE 1 moves out of the coverage of the E-UTRAN (ie, the UE1 is not adjacent to the eNodeB1), and the UE1 can continue with the UE supporting the relay capability. Interact data with eNodeBl.
  • the process of discovering a relay node is as shown in FIG. 15 , and specifically includes:
  • Step 151 The UE1 broadcasts a relay request message, where the parameters carried in the relay request message are the identifier of the UE1 and the identifier of the eNodeB1.
  • the UE3, the UE4, and the UE6 that are adjacent to the UE1 can receive the relay request message broadcasted by the UE1, and perform different processing according to whether the relay capability and the connection status of the UE1 are supported, as follows:
  • Step 152a The UE3 supports the relay capability, and the identifier of the eNodeB currently connected by the UE3 is the same as the identifier of the eNodeB in the broadcast message, and the UE3 returns a relay reply message to the UE1, where the parameter carried by the relay reply message is the identifier of the UE3.
  • Step 152b The UE4 supports the relay capability, but the identifier of the eNodeB currently connected to the UE4 (ie, the identifier of the eNodeB2) is different from the identifier of the eNodeB in the broadcast message (ie, the identifier of the eNodeB1), and the UE4 discards the broadcast message of the present message.
  • Step 152c UE6 does not support the relay capability, and UE6 discards the broadcast message of this article.
  • UE1 determines that UE3 can act as a relay node that communicates with eNodeB 1 itself.
  • the above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
  • a discovery device for a relay node is further provided in the embodiment of the present invention. Since the principle of solving the problem is similar to the method for discovering the relay node shown in FIG. 8, the implementation of the device may be See The implementation of the method shown in FIG. 8 will not be repeated here.
  • an embodiment of the present invention provides a discovery device for a relay node, including:
  • the first determining module 161 is configured to determine that the communication target party that needs to communicate with itself is not adjacent to the self; the sending module 162 is configured to send a relay request, where the relay request is used to request the neighboring communication device adjacent to itself as the self a relay node with the communication target party, and the relay request carries at least the identification information of the communication target party;
  • the second determining module 163 is configured to determine, according to the received relay reply message returned by the neighboring communication device, whether the neighboring communication device can serve as a relay node between itself and the communication target.
  • the sending module 162 is specifically configured to: send a relay request by using a broadcast manner, and the relay request carries the self-identification information and the identifier information of the communication target party;
  • the second determining module 163 is specifically configured to: if receiving the relay reply message returned by the neighboring communication device, determine that the neighboring communication device can act as a relay node between the self and the communication target, and the relay reply message carries the neighboring communication device Identification information.
  • the second determining module 163 is further configured to:
  • the sending module 162 is specifically configured to: send a relay request to each neighboring communication device, and the relay request carries the identifier information of the communication target party;
  • the second determining module 163 is specifically configured to: if the relay reply message returned by the neighboring communication device carries the first indication information that is used to indicate that it can serve as a relay node between the communication initiator and the communication target, determine the proximity communication The device can act as a relay node between itself and the communication target; if the relay reply message returned by the neighboring communication device carries the second indication information indicating that it cannot be the relay node between the communication initiator and the communication target And determining that the neighboring communication device cannot act as a relay node between itself and the communication target.
  • the sending module 162 is further configured to:
  • a relay request is sent to each of the neighboring communication devices that support the relay capability.
  • the first determining module 161 determines each of the neighboring communication devices according to the following steps:
  • the feedback information determines that the communication device corresponding to the identifier information carried in the feedback information is a neighboring communication device.
  • the first request message is further used to request each neighboring communication device to indicate whether it supports the relay capability in the returned feedback information.
  • the first determining module 161 determines whether it is adjacent to the designated communication device according to the following steps: Transmitting, by the broadcast mode, a second request message, where the second request message is used to request the designated communication device to return the feedback information that carries the identifier information when the second request message is received, where the second request message carries its own identification information and Identification information of the designated communication device;
  • the identification information carried in the feedback information is the same as the identification information of the designated communication device, it is determined that it is adjacent to the designated communication device;
  • the second request message is further used to request the designated communication device to indicate whether it supports the relay capability in the returned feedback information.
  • an embodiment of the present invention further provides a device adjacent to the communication initiator.
  • the principle of solving the problem is similar to the method for discovering the relay node shown in FIG. 9 above. See the implementation of the method shown in Figure 9, and the repeated description will not be repeated.
  • an embodiment of the present invention provides a device that is adjacent to a communication initiator, and the device includes: a determining module 171, configured to: after receiving a relay request sent by a communication initiator, according to a relay request, Determining whether it is currently a relay node between the communication initiator and the communication target, and the relay request carries at least the identification information of the communication target;
  • the processing module 172 is configured to determine, according to the determination result of the determining module 171, whether to return a relay reply message to the communication initiator.
  • processing module 172 is specifically configured to:
  • the relay request carries the identification information of the communication initiator and the identification information of the communication target, then:
  • the relay initiator When it is determined that it is currently a relay node between the communication initiator and the communication target, the relay initiator returns a relay reply message, and the relay reply message carries the own identification information;
  • the relay request is discarded when it is determined that it is currently not a relay node between the communication initiator and the communication target.
  • processing module 172 is specifically configured to:
  • the communication initiation direction sends a relay request to each of the neighboring communication devices or each of the neighboring communication devices supporting the relay capability, and the relay request carries the identification information of the communication target, then:
  • a relay reply message carrying the first indication information, where the first indication information is used to indicate that it can serve as a communication, when determining that it is currently capable of acting as a relay node between the communication initiator and the communication target party a relay node between the initiator and the communication target;
  • the communication initiator returns a relay reply message carrying the second indication information, where the second indication information is used to indicate that the communication cannot be used as the communication A relay node between the initiator and the communication target.
  • the decision module 171 is specifically configured to:
  • the determining module 171 is specifically configured to:
  • the judgment condition When the judgment condition is satisfied, it is determined that it can serve as a relay node between the communication initiator and the communication target; when the judgment condition is not satisfied, it is determined that the relay node between the communication initiator and the communication target cannot be used as a relay node.
  • the predetermined judgment conditions include one or a combination of the following:
  • Pre-set user preferences their current processing load, and the strength of the signal they receive the communication target.
  • the determining module 171 determines a communication device adjacent to itself according to the following steps:
  • the third request message is used to request the communication device that is adjacent to the user to return the feedback information carrying the identification information of the communication device, and the third request message carries the self-identification information;
  • the communication device corresponding to the identifier information carried in the feedback information is adjacent to itself.
  • the determining module 171 determines whether it is adjacent to the designated communication device according to the following steps: sending a fourth request message by using a broadcast method, where the fourth request message is used to request the designated communication device to return when receiving the fourth request message. Carrying feedback information of the identification information of the communication device, where the fourth request message carries the own identification information and the identification information of the designated communication device;
  • the identification information carried in the feedback information is the same as the identification information of the designated communication device, it is determined that it is adjacent to the designated communication device;
  • the apparatus further includes:
  • a proximity relationship feedback module configured to: when receiving the first request message sent by the communication initiator by way of broadcast, Returning feedback information carrying the self-identification information to the communication initiator, where the first request message carries the identification information of the communication initiator.
  • the proximity relationship feedback module is also used to:
  • the second request message is discarded.
  • the proximity relationship feedback module is further configured to indicate, by using the returned feedback information, whether the relay capability is supported by itself.
  • the neighboring device capable of acting as a relay node between the communication initiator and the communication target is public safety
  • a device for discovering a relay node includes a first processor 181, a sending port 182, and a second processor 183, where
  • a first processor 181 configured to determine that a communication target that needs to communicate with itself is not adjacent to itself; a sending port 182, configured to send a relay request, and the relay request is used to request a neighboring communication device adjacent to itself as a relay node between the communication target parties, and the relay request carries at least the identification information of the communication target party; the second processor 183 is configured to determine the neighboring communication device according to the received relay reply message returned by the neighboring communication device Whether it can act as a relay node between itself and the communication target.
  • the sending port 182 is specifically configured to: send a relay request by using a broadcast mode, and the relay request carries the identity information of the identity and the identity information of the communication target party;
  • the second processor 183 is specifically configured to: if receiving the relay reply message returned by the neighboring communication device, determine that the neighboring communication device can act as a relay node between itself and the communication target, and the relay reply message carries the neighboring communication device Identification information.
  • the second processor 183 is also used to:
  • the sending port 182 is specifically configured to: send a relay request to each neighboring communication device, and the relay request carries the identifier information of the communication target party;
  • the second processor 183 is specifically configured to: if the relay reply message returned by the neighboring communication device carries the first indication information that is used to indicate that it can serve as a relay node between the communication initiator and the communication target, determine the neighboring communication device. Being capable of acting as a relay node between itself and the communication target; if the relay reply message returned by the neighboring communication device carries the second indication information indicating that it cannot be the relay node between the communication initiator and the communication target, It is then determined that the proximity communication device cannot act as a relay node between itself and the communication target.
  • the transmit port 182 is further used to:
  • a relay request is transmitted to each of the neighboring communication devices supporting the relay capability, wherein the relay capability refers to the ability of the communication device to be a relay node between other communication devices other than itself.
  • an apparatus adjacent to a communication initiator is provided in an embodiment of the present invention, including a processor 191.
  • the processor 191 is configured to: after receiving the relay request sent by the communication initiator, determine, according to the relay request, whether the current node can be the relay node between the communication initiator and the communication target, and the relay request carries at least The identification information of the communication target party, and determining whether to return a relay reply message to the communication initiator according to the judgment result of the determination module.
  • the processor 191 is specifically configured to:
  • the relay request carries the identification information of the communication initiator and the identification information of the communication target, then:
  • the relay initiator When it is determined that it is currently a relay node between the communication initiator and the communication target, the relay initiator returns a relay reply message, and the relay reply message carries the own identification information;
  • the relay request is discarded when it is determined that it is currently not a relay node between the communication initiator and the communication target.
  • the processor 191 is specifically configured to:
  • the relay capability means that the communication device can currently act as a self-distribution
  • the capabilities of relay nodes between other communication devices such as:
  • the communication initiator When it is determined that it is currently capable of acting as a relay node between the communication initiator and the communication target, the communication initiator returns a relay reply message carrying the first indication information, where the first indication information is used to indicate that the user can initiate the communication. a relay node between the party and the communication target party;
  • the relay initiator When it is determined that the relay node between the communication initiator and the communication target is not currently available, the relay initiator returns a relay reply message carrying the second indication information, where the second indication information is used to indicate that the communication initiator cannot initiate the communication.
  • the second indication information is used to indicate that the communication initiator cannot initiate the communication.
  • the processor 191 is specifically configured to:
  • the relay capability refers to the ability of the communication device to currently act as a relay node between communication devices other than itself.
  • the processor 191 is specifically configured to:
  • the judgment condition When the judgment condition is satisfied, it is determined that it can serve as a relay node between the communication initiator and the communication target; when the judgment condition is not satisfied, it is determined that it cannot be the communication initiator and the communication
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de découverte de nœud relais, qui sont utilisés pour résoudre un problème de l'état de la technique concernant l'absence de solution associée la découverte d'une relation de voisinage entre deux interlocuteurs en communication et un dispositif de communications prenant en charge une capacité de relais. Selon le mode de réalisation de la présente invention, le procédé comprend les étapes consistant : à déterminer, par un initiateur de communication, qu'une cible de communication ayant besoin de communiquer avec l'initiateur de communication n'est pas voisine de l'initiateur de communication ; à envoyer, par l'initiateur de communication, une requête de relais, la requête de relais étant utilisée pour demander qu'un dispositif de communications voisin, qui est voisin de l'initiateur de communication, serve de nœud relais entre l'initiateur de communication et la cible de communication ; et à déterminer, par l'initiateur de communication, conformément à un message de réponse de relais reçu renvoyé par le dispositif de communications voisin, si le dispositif de communications voisin peut servir de nœud relais entre l'initiateur de communication et la cible de communication.
PCT/CN2014/077256 2013-05-13 2014-05-12 Procédé et appareil de découverte de nœud relais WO2014183617A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10211907B1 (en) 2016-05-26 2019-02-19 Sprint Spectrum L.P. Coordinated multipoint mode selection for relay base station
US10237759B1 (en) * 2017-03-29 2019-03-19 Sprint Spectrum L.P. Coordinated multipoint set selection based on donor status

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106162511B (zh) * 2015-04-08 2020-01-24 电信科学技术研究院 一种d2d中继节点的确定、使用方法及装置
CN107211340B (zh) * 2015-08-10 2021-01-05 华为技术有限公司 数据传输方法及ue
CN106027135A (zh) * 2016-04-27 2016-10-12 浙江万里学院 一种基于信道质量的差分相乘双向中继传输方法
CN106341860B (zh) * 2016-08-26 2020-01-21 宇龙计算机通信科技(深圳)有限公司 一种中继网络连接方法及相关设备
CN112422598A (zh) * 2019-08-22 2021-02-26 中兴通讯股份有限公司 资源调度方法、智能前端设备、智能网关及分布式系统
WO2021139906A1 (fr) * 2020-01-07 2021-07-15 Telefonaktiebolaget Lm Ericsson (Publ) Sélection de chemin pour communications de liaison latérale dans un réseau nr
CN111212404A (zh) * 2020-01-10 2020-05-29 北京猎户星空科技有限公司 机器人通信方法、系统、装置及机器人、存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101107600A (zh) * 2005-01-25 2008-01-16 松下电器产业株式会社 通信终端、终端切换系统以及终端切换方法
CN101516117A (zh) * 2008-02-20 2009-08-26 财团法人工业技术研究院 通信网络的切换方法
CN101883048A (zh) * 2010-06-25 2010-11-10 陶洋 多维网络的路由方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4569328B2 (ja) * 2004-03-18 2010-10-27 パナソニック株式会社 無線通信装置および経路探索方法
US8023552B2 (en) * 2006-09-22 2011-09-20 Alcatel Lucent Methods of discovering neighbors in opportunistic open access ad hoc wireless networks
WO2010118578A1 (fr) * 2009-04-16 2010-10-21 华为技术有限公司 Procédé, équipement et système de routage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101107600A (zh) * 2005-01-25 2008-01-16 松下电器产业株式会社 通信终端、终端切换系统以及终端切换方法
CN101516117A (zh) * 2008-02-20 2009-08-26 财团法人工业技术研究院 通信网络的切换方法
CN101883048A (zh) * 2010-06-25 2010-11-10 陶洋 多维网络的路由方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10211907B1 (en) 2016-05-26 2019-02-19 Sprint Spectrum L.P. Coordinated multipoint mode selection for relay base station
US10237759B1 (en) * 2017-03-29 2019-03-19 Sprint Spectrum L.P. Coordinated multipoint set selection based on donor status

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